Halo CEA::Skull info::
Name: Iron
Desc: a hammer with a circle around it
Effect: Makes it so if you die in solo, level is restarted. If partner dies in co-op, revert to checkpoint
Name: mythic
Desc: A bunch of semi-circles around eachother, like a whirlpool. It's next to iron
Effect: All NPCs health allocation is doubled
Source: It's been in Halo 3 onward using this symbol
Name:
Desc: A question mark inside a circle
Effect: (conjecture) I highly suspect that this skull will be like 'malfunction', but it will activate a random skull every time you respawn from death. This is just a hunch, but it seems to make sense.
Source: Conjecture
Name: Recession
Desc: A revolver with one shot in it, inside a circle
Effect: All shots fired by the player take away two bullets/charges/whatever.
Source: A PoA playthrough in NYCC (Dan Ayoub himself told about this skull)
Name: Blackeye
Desc: Skull with only one eye (don't confuse this with the eyepatch one!)
Effect: To regenerate shields, player must melee enemies
Source: It's been in Halo 3 onward using this symbol
Name: Fog
Desc: It looks like a wave inside a circle
Effect: Disables player's HUD
Name: Famine
Desc: A skull inside a semi-circle with four dots under it
Effect: Weapons dropped by enemies have lower ammo
Name: Boom
Desc: A bunch of lines radiating out like an explosion
Effect: Doubles the damage radius of explosions
Name: Bandana
Desc: A skull wearing a bandana
Effect: Unlimited ammo
Source: A PoA playthrough at NYCC (Dan Ayoub himself told about this skull)
Name: Grunt Funeral
Desc: Grunt with Xed out eyes
Effect: A few seconds after death, grunts asplode
pre-order bonus
Name: Grunt Birthday Party
Desc: A candle
Effect: upon a headshot death, grunts' heads blow up with confetti and a cheer
Source: It's been in every halo game besides CE, using this exact symbol
Name:
Desc: a piece of candy
Effect:
Source: N/A
Name:
Desc: Skull with eyepatch
Effect:
Source: N/A
Name: Malfunction
Desc: skull with lightening going down its forehead.
Effect: A random element of the player's HUD is disabled